The mobility of contaminants from mine waste can be assessed using different extraction methods. Aqua regia (AR) extraction is the most commonly used method in Finland. Another method is the analysis of leachate from net acid generation (NAG) tests, which is primarily designed for acid production potential assessment. We investigated the performance of single-addition NAG test leachate analysis and AR extraction in drainage quality prediction, using waste rock and drainage water samples from several Finnish waste rock sites. Our objective was to improve interpretation of the AR and single-addition NAG test leachate analysis results in drainage quality prediction. The AR extraction effectively reflected elements that occurred in elevated concentrations in drainage water, though it over-predicted Al, As, Cd, Co, Cu, and Ni in some circumneutral drainages, and Cr in general. The single-addition NAG test leachate analysis also performed well in assessing the mobility of contaminants including Al and Cr at acid mine drainage sites. As the contaminants tend to precipitate in neutral NAG test solution, the usability of the method in neutral mine drainage cases should be further investigated. Furthermore, the conclusions presented in this study are limited to waste rock samples collected from the surface of piles; future work will examine waste rock history, dump cores, drainage quality changes, etc. in more detail.

矿山废物中污染物的迁移率可以使用不同的提取方法进行评估。王水提取（AR）是芬兰最常用的方法。另一种方法是通过净酸生成（NAG）测试分析渗滤液，该方法主要用于评估酸的生产潜力。我们使用来自几个芬兰废石场的废石和排水样品，研究了单次添加NAG试验浸出液分析和AR提取在排水质量预测中的性能。我们的目标是在排水质量预测中改善对AR和单次添加NAG试验浸出液分析结果的解释。尽管AR萃取量高估了Al，As，Cd，Co，Cu，镍在某些环向排水系统中，而铬在一般情况下。单次添加的NAG试验渗滤液分析在评估酸性矿山排水点的污染物（包括Al和Cr）的迁移率方面也表现出色。由于污染物倾向于在中性NAG测试溶液中沉淀，因此应进一步研究该方法在中性矿山排水情况下的可用性。此外，本研究提出的结论仅限于从桩表面收集的废石样品。未来的工作将更详细地检查废石的历史，堆放岩心，排水质量的变化等。该方法在中性矿山排水情况下的可用性应进一步研究。此外，本研究提出的结论仅限于从桩表面收集的废石样品。未来的工作将更详细地检查废石的历史，堆放岩心，排水质量的变化等。该方法在中性矿山排水情况下的可用性应进一步研究。此外，本研究提出的结论仅限于从桩表面收集的废石样品。未来的工作将更详细地检查废石的历史，堆放岩心，排水质量的变化等。